linux-toradex.git/arch/sparc/kernel/cpu.c, branch v3.0.65

sparc: Sanitize cpu feature detection and reporting.

2011-08-16T01:31:40+00:00

[ Upstream commit ac85fe8b21248054851e05bfaa352562e5b06dd3 ]

Instead of evaluating the cpu features for ELF_HWCAP every exec,
calculate it once at boot time.

Add AV_SPARC_* capability flag bits, compatible with what Solaris
reports to applications.

Report these capabilities once in the kernel log, and also via
/proc/cpuinfo in a new "cpucaps" entry.

If available, fetch the cpu features from the machine description
'hwcap-list' property of the 'cpu' node.

Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

sparc: Detect and handle UltraSPARC-T3 cpu types.

2011-08-16T01:31:40+00:00

[ Upstream commit 4ba991d3eb379fbaa22049e7002341e97a673685 ]

The cpu compatible string we look for is "SPARC-T3".

As far as memset/memcpy optimizations go, we treat this chip the same
as Niagara-T2/T2+.  Use cache initializing stores for memset, and use
perfetch, FPU block loads, cache initializing stores, and block stores
for copies.

We use the Niagara-T2 perf support, since T3 is a close relative in
this regard.  Later we'll add support for the new events T3 can
report, plus enable T3's new "sample" mode.

For now I haven't added any new ELF hwcap flags.  We probably need
to add a couple, for example:

T2 and T3 both support the population count instruction in hardware.

T3 supports VIS3 instructions, including support (finally) for
partitioned shift.  One can also now move directly between float
and integer registers.

T3 supports instructions meant to help with Galois Field and other HPC
calculations, such as XOR multiply.  Also there are "OP and negate"
instructions, for example "fnmul" which is multiply-and-negate.

T3 recognizes the transactional memory opcodes, however since
transactional memory isn't supported: 1) 'commit' behaves as a NOP and
2) 'chkpt' always branches 3) 'rdcps' returns all zeros and 4) 'wrcps'
behaves as a NOP.

So we'll need about 3 new elf capability flags in the end to represent
all of these things.

Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

sparc: Don't leave sparc_pmu_type NULL on sun4v.

2011-08-16T01:31:40+00:00

[ Upstream commit facfddef2c76110b8e321921f7e54518c3dd1579 ]

Otherwise we'll crash in the sparc perf init code.

Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

sparc32: probe for cpu info only during startup

2011-04-21T22:46:21+00:00

We did a cpu_probe() call each time a CPU got online - which
only effect was to save latest CPU/FPU info for use by show_cpuinfo().
Use same setup as for sparc64 where we probe for this info during startup,
and only once.

This allowed us to annotate a few functions __init which again
fixed the following section mismatch warnings:

WARNING: vmlinux.o(.text+0x65f0): Section mismatch in reference from the function set_cpu_and_fpu() to the (unknown reference) .init.rodata:(unknown)
WARNING: vmlinux.o(.text+0x65f8): Section mismatch in reference from the function set_cpu_and_fpu() to the (unknown reference) .init.rodata:(unknown)
WARNING: vmlinux.o(.text+0x664c): Section mismatch in reference from the function set_cpu_and_fpu() to the variable .init.rodata:manufacturer_info
WARNING: vmlinux.o(.text+0x6650): Section mismatch in reference from the function set_cpu_and_fpu() to the variable .init.rodata:manufacturer_info

Signed-off-by: Sam Ravnborg 
Signed-off-by: David S. Miller

sparc: consolidate show_cpuinfo in cpu.c

2011-04-21T22:45:45+00:00

We have all the cpu related info in cpu.c - so move
the remaining functions to support /proc/cpuinfo to this file.

Signed-off-by: Sam Ravnborg 
Signed-off-by: David S. Miller

sparc32/leon: FPU-FSR only available when FPU present

2011-03-17T01:19:05+00:00

Signed-off-by: Daniel Hellstrom 
Acked-by: Sam Ravnborg 
Signed-off-by: David S. Miller

sparc64: Fix bootup regression due to perf init ordering.

2011-01-09T23:36:46+00:00

Commit 004417a6d468e24399e383645c068b498eed84ad
("perf, arch: Cleanup perf-pmu init vs lockup-detector")
move the perf events init to be an early_initcall.

But this won't work properly unless the dependencies for
this code initialize beforehand.

Fix it by making cpu_type_probe and pcr_arch_init be
an early_initcall as well.

Reported-by: Sam Ravnborg 
Signed-off-by: David S. Miller

sparc, leon: Added Aeroflex Gaisler entry in manufacturer_info structure

2009-12-03T06:28:49+00:00

Signed-off-by: Kristoffer Glembo 
Signed-off-by: David S. Miller

sparc,leon: Introduce the sparc-leon CPU type.

2009-08-18T01:32:10+00:00

Add sparc_leon enum, M_LEON|M_LEON3_SOC machine. Add compilation of
leon.c in mm and kernel
if CONFIG_SPARC_LEON is defined. Add sparc_leon dependent
initialization to switch statements + head.S.

Signed-off-by: Konrad Eisele 
Reviewed-by:   Sam Ravnborg 
Signed-off-by: David S. Miller

sparc: Probe PMU type and record in sparc_pmu_type.

2009-01-29T01:27:14+00:00

Signed-off-by: David S. Miller